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>> 26 // $Id: G4MuBetheBlochModel.cc 85023 2014-10-23 09:56:39Z gcosmo $
26 // 27 //
27 // ------------------------------------------- 28 // -------------------------------------------------------------------
28 // 29 //
29 // GEANT4 Class header file 30 // GEANT4 Class header file
30 // 31 //
31 // 32 //
32 // File name: G4MuBetheBlochModel 33 // File name: G4MuBetheBlochModel
33 // 34 //
34 // Author: Vladimir Ivanchenko on base 35 // Author: Vladimir Ivanchenko on base of Laszlo Urban code
35 // 36 //
36 // Creation date: 09.08.2002 37 // Creation date: 09.08.2002
37 // 38 //
38 // Modifications: 39 // Modifications:
39 // 40 //
40 // 04-12-02 Fix problem of G4DynamicParticle c 41 // 04-12-02 Fix problem of G4DynamicParticle constructor (V.Ivanchenko)
41 // 23-12-02 Change interface in order to move 42 // 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
42 // 27-01-03 Make models region aware (V.Ivanch 43 // 27-01-03 Make models region aware (V.Ivanchenko)
43 // 13-02-03 Add name (V.Ivanchenko) 44 // 13-02-03 Add name (V.Ivanchenko)
44 // 10-02-04 Calculation of radiative correctio 45 // 10-02-04 Calculation of radiative corrections using R.Kokoulin model (V.I)
45 // 08-04-05 Major optimisation of internal int 46 // 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
46 // 12-04-05 Add usage of G4EmCorrections (V.Iv 47 // 12-04-05 Add usage of G4EmCorrections (V.Ivanchenko)
47 // 13-02-06 ComputeCrossSectionPerElectron, Co 48 // 13-02-06 ComputeCrossSectionPerElectron, ComputeCrossSectionPerAtom (mma)
48 // 49 //
49 50
50 // 51 //
51 // ------------------------------------------- 52 // -------------------------------------------------------------------
52 // 53 //
53 54
54 //....oooOO0OOooo........oooOO0OOooo........oo 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
55 //....oooOO0OOooo........oooOO0OOooo........oo 56 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
56 57
57 #include "G4MuBetheBlochModel.hh" 58 #include "G4MuBetheBlochModel.hh"
58 #include "G4PhysicalConstants.hh" 59 #include "G4PhysicalConstants.hh"
59 #include "G4SystemOfUnits.hh" 60 #include "G4SystemOfUnits.hh"
60 #include "Randomize.hh" 61 #include "Randomize.hh"
61 #include "G4Electron.hh" 62 #include "G4Electron.hh"
62 #include "G4LossTableManager.hh" 63 #include "G4LossTableManager.hh"
63 #include "G4EmCorrections.hh" 64 #include "G4EmCorrections.hh"
64 #include "G4ParticleChangeForLoss.hh" 65 #include "G4ParticleChangeForLoss.hh"
65 #include "G4Log.hh" 66 #include "G4Log.hh"
66 #include "G4Exp.hh" 67 #include "G4Exp.hh"
67 #include "G4DeltaAngle.hh" <<
68 68
69 G4double G4MuBetheBlochModel::xgi[]={ 0.0199, 69 G4double G4MuBetheBlochModel::xgi[]={ 0.0199, 0.1017, 0.2372, 0.4083, 0.5917,
70 0.7628, 70 0.7628, 0.8983, 0.9801 };
71 << 71
72 G4double G4MuBetheBlochModel::wgi[]={ 0.0506, 72 G4double G4MuBetheBlochModel::wgi[]={ 0.0506, 0.1112, 0.1569, 0.1813, 0.1813,
73 0.1569, 73 0.1569, 0.1112, 0.0506 };
74 74
75 //....oooOO0OOooo........oooOO0OOooo........oo 75 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
76 76
>> 77 using namespace std;
>> 78
77 G4MuBetheBlochModel::G4MuBetheBlochModel(const 79 G4MuBetheBlochModel::G4MuBetheBlochModel(const G4ParticleDefinition* p,
78 const 80 const G4String& nam)
79 : G4VEmModel(nam), 81 : G4VEmModel(nam),
80 limitRadCorrection(250.*CLHEP::MeV), << 82 particle(0),
81 limitKinEnergy(100.*CLHEP::keV), << 83 limitKinEnergy(100.*keV),
82 logLimitKinEnergy(G4Log(limitKinEnergy)), << 84 logLimitKinEnergy(G4Log(limitKinEnergy)),
83 twoln10(2.0*G4Log(10.0)), << 85 twoln10(2.0*G4Log(10.0)),
84 alphaprime(CLHEP::fine_structure_const/CLH << 86 bg2lim(0.0169),
>> 87 taulim(8.4146e-3),
>> 88 alphaprime(fine_structure_const/twopi)
85 { 89 {
86 theElectron = G4Electron::Electron(); 90 theElectron = G4Electron::Electron();
87 corr = G4LossTableManager::Instance()->EmCor 91 corr = G4LossTableManager::Instance()->EmCorrections();
88 if(nullptr != p) { SetParticle(p); } << 92 fParticleChange = 0;
>> 93
>> 94 // initial initialisation of memeber should be overwritten
>> 95 // by SetParticle
>> 96 mass = massSquare = ratio = 1.0;
>> 97
>> 98 if(p) { SetParticle(p); }
89 } 99 }
90 100
91 //....oooOO0OOooo........oooOO0OOooo........oo 101 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
92 102
>> 103 G4MuBetheBlochModel::~G4MuBetheBlochModel()
>> 104 {}
>> 105
>> 106 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 107
93 G4double G4MuBetheBlochModel::MinEnergyCut(con 108 G4double G4MuBetheBlochModel::MinEnergyCut(const G4ParticleDefinition*,
94 con 109 const G4MaterialCutsCouple* couple)
95 { 110 {
96 return couple->GetMaterial()->GetIonisation( 111 return couple->GetMaterial()->GetIonisation()->GetMeanExcitationEnergy();
97 } 112 }
98 113
99 //....oooOO0OOooo........oooOO0OOooo........oo 114 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
100 115
101 G4double G4MuBetheBlochModel::MaxSecondaryEner 116 G4double G4MuBetheBlochModel::MaxSecondaryEnergy(const G4ParticleDefinition*,
102 << 117 G4double kinEnergy)
103 { 118 {
104 G4double tau = kinEnergy/mass; 119 G4double tau = kinEnergy/mass;
105 G4double tmax = 2.0*CLHEP::electron_mass_c2* << 120 G4double tmax = 2.0*electron_mass_c2*tau*(tau + 2.) /
106 (1. + 2.0*(tau + 1.)*ratio + 121 (1. + 2.0*(tau + 1.)*ratio + ratio*ratio);
107 return tmax; 122 return tmax;
108 } 123 }
109 124
110 //....oooOO0OOooo........oooOO0OOooo........oo 125 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
111 126
112 void G4MuBetheBlochModel::SetParticle(const G4 <<
113 { <<
114 if(nullptr == particle) { <<
115 particle = p; <<
116 mass = particle->GetPDGMass(); <<
117 massSquare = mass*mass; <<
118 ratio = CLHEP::electron_mass_c2/mass; <<
119 } <<
120 } <<
121 <<
122 //....oooOO0OOooo........oooOO0OOooo........oo <<
123 <<
124 void G4MuBetheBlochModel::Initialise(const G4P 127 void G4MuBetheBlochModel::Initialise(const G4ParticleDefinition* p,
125 const G4D 128 const G4DataVector&)
126 { 129 {
127 SetParticle(p); << 130 if(p) { SetParticle(p); }
128 if(nullptr == fParticleChange) { << 131 if(!fParticleChange) { fParticleChange = GetParticleChangeForLoss(); }
129 fParticleChange = GetParticleChangeForLoss <<
130 if(UseAngularGeneratorFlag() && nullptr == <<
131 SetAngularDistribution(new G4DeltaAngle( <<
132 } <<
133 } <<
134 } 132 }
135 133
136 //....oooOO0OOooo........oooOO0OOooo........oo 134 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
137 135
138 G4double G4MuBetheBlochModel::ComputeCrossSect 136 G4double G4MuBetheBlochModel::ComputeCrossSectionPerElectron(
139 con 137 const G4ParticleDefinition* p,
140 138 G4double kineticEnergy,
141 139 G4double cutEnergy,
142 140 G4double maxKinEnergy)
143 { 141 {
144 G4double cross = 0.0; 142 G4double cross = 0.0;
145 G4double tmax = MaxSecondaryEnergy(p, kineti 143 G4double tmax = MaxSecondaryEnergy(p, kineticEnergy);
146 G4double maxEnergy = std::min(tmax, maxKinEn << 144 G4double maxEnergy = min(tmax,maxKinEnergy);
147 if(cutEnergy < maxEnergy) { 145 if(cutEnergy < maxEnergy) {
148 146
149 G4double totEnergy = kineticEnergy + mass; 147 G4double totEnergy = kineticEnergy + mass;
150 G4double energy2 = totEnergy*totEnergy; << 148 G4double energy2 = totEnergy*totEnergy;
151 G4double beta2 = kineticEnergy*(kineticEne << 149 G4double beta2 = kineticEnergy*(kineticEnergy + 2.0*mass)/energy2;
152 150
153 cross = 1.0/cutEnergy - 1.0/maxEnergy - << 151 cross = 1.0/cutEnergy - 1.0/maxEnergy - beta2*G4Log(maxEnergy/cutEnergy)/tmax
154 beta2*G4Log(maxEnergy/cutEnergy)/tmax + << 152 + 0.5*(maxEnergy - cutEnergy)/energy2;
155 0.5*(maxEnergy - cutEnergy)/energy2; <<
156 153
157 // radiative corrections of R. Kokoulin 154 // radiative corrections of R. Kokoulin
158 if (maxEnergy > limitKinEnergy && kineticE << 155 if (maxEnergy > limitKinEnergy) {
159 156
160 G4double logtmax = G4Log(maxEnergy); 157 G4double logtmax = G4Log(maxEnergy);
161 G4double logtmin = G4Log(std::max(cutEne << 158 G4double logtmin = G4Log(max(cutEnergy,limitKinEnergy));
162 G4double logstep = logtmax - logtmin; 159 G4double logstep = logtmax - logtmin;
163 G4double dcross = 0.0; 160 G4double dcross = 0.0;
164 161
165 for (G4int ll=0; ll<8; ++ll) { << 162 for (G4int ll=0; ll<8; ll++)
>> 163 {
166 G4double ep = G4Exp(logtmin + xgi[ll]* 164 G4double ep = G4Exp(logtmin + xgi[ll]*logstep);
167 G4double a1 = G4Log(1.0 + 2.0*ep/CLHEP << 165 G4double a1 = G4Log(1.0 + 2.0*ep/electron_mass_c2);
168 G4double a3 = G4Log(4.0*totEnergy*(tot 166 G4double a3 = G4Log(4.0*totEnergy*(totEnergy - ep)/massSquare);
169 dcross += wgi[ll]*(1.0/ep - beta2/tmax 167 dcross += wgi[ll]*(1.0/ep - beta2/tmax + 0.5*ep/energy2)*a1*(a3 - a1);
170 } 168 }
>> 169
171 cross += dcross*logstep*alphaprime; 170 cross += dcross*logstep*alphaprime;
172 } 171 }
173 cross *= CLHEP::twopi_mc2_rcl2/beta2; << 172
>> 173 cross *= twopi_mc2_rcl2/beta2;
>> 174
174 } 175 }
>> 176
175 // G4cout << "tmin= " << cutEnergy << " tma 177 // G4cout << "tmin= " << cutEnergy << " tmax= " << tmax
176 // << " cross= " << cross << G4endl; << 178 // << " cross= " << cross << G4endl;
>> 179
177 return cross; 180 return cross;
178 } 181 }
179 182
180 //....oooOO0OOooo........oooOO0OOooo........oo 183 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
181 184
182 G4double G4MuBetheBlochModel::ComputeCrossSect 185 G4double G4MuBetheBlochModel::ComputeCrossSectionPerAtom(
183 con 186 const G4ParticleDefinition* p,
184 187 G4double kineticEnergy,
185 << 188 G4double Z, G4double,
186 189 G4double cutEnergy,
187 190 G4double maxEnergy)
188 { 191 {
189 G4double cross = Z*ComputeCrossSectionPerEle 192 G4double cross = Z*ComputeCrossSectionPerElectron
190 (p,ki 193 (p,kineticEnergy,cutEnergy,maxEnergy);
191 return cross; 194 return cross;
192 } 195 }
193 196
194 //....oooOO0OOooo........oooOO0OOooo........oo 197 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
195 198
196 G4double G4MuBetheBlochModel::CrossSectionPerV 199 G4double G4MuBetheBlochModel::CrossSectionPerVolume(
197 con << 200 const G4Material* material,
198 con 201 const G4ParticleDefinition* p,
199 202 G4double kineticEnergy,
200 203 G4double cutEnergy,
201 204 G4double maxEnergy)
202 { 205 {
203 G4double eDensity = material->GetElectronDen 206 G4double eDensity = material->GetElectronDensity();
204 G4double cross = eDensity*ComputeCrossSectio 207 G4double cross = eDensity*ComputeCrossSectionPerElectron
205 (p,ki 208 (p,kineticEnergy,cutEnergy,maxEnergy);
206 return cross; 209 return cross;
207 } 210 }
208 211
209 //....oooOO0OOooo........oooOO0OOooo........oo 212 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
210 213
211 G4double G4MuBetheBlochModel::ComputeDEDXPerVo 214 G4double G4MuBetheBlochModel::ComputeDEDXPerVolume(const G4Material* material,
212 << 215 const G4ParticleDefinition* p,
213 << 216 G4double kineticEnergy,
214 << 217 G4double cut)
215 { 218 {
216 G4double tmax = MaxSecondaryEnergy(p, kinet 219 G4double tmax = MaxSecondaryEnergy(p, kineticEnergy);
217 G4double tau = kineticEnergy/mass; 220 G4double tau = kineticEnergy/mass;
218 G4double cutEnergy = std::min(cut, tmax); << 221 G4double cutEnergy = min(cut,tmax);
219 G4double gam = tau + 1.0; 222 G4double gam = tau + 1.0;
220 G4double bg2 = tau * (tau+2.0); 223 G4double bg2 = tau * (tau+2.0);
221 G4double beta2 = bg2/(gam*gam); 224 G4double beta2 = bg2/(gam*gam);
222 225
223 G4double eexc = material->GetIonisation()-> 226 G4double eexc = material->GetIonisation()->GetMeanExcitationEnergy();
224 G4double eexc2 = eexc*eexc; 227 G4double eexc2 = eexc*eexc;
225 228
226 G4double eDensity = material->GetElectronDen 229 G4double eDensity = material->GetElectronDensity();
227 230
228 G4double dedx = G4Log(2.0*CLHEP::electron_ma << 231 G4double dedx = G4Log(2.0*electron_mass_c2*bg2*cutEnergy/eexc2)
229 -(1.0 + cutEnergy/tmax)*beta2 232 -(1.0 + cutEnergy/tmax)*beta2;
230 233
231 G4double totEnergy = kineticEnergy + mass; 234 G4double totEnergy = kineticEnergy + mass;
232 G4double del = 0.5*cutEnergy/totEnergy; 235 G4double del = 0.5*cutEnergy/totEnergy;
233 dedx += del*del; 236 dedx += del*del;
234 237
235 // density correction 238 // density correction
236 G4double x = G4Log(bg2)/twoln10; 239 G4double x = G4Log(bg2)/twoln10;
237 dedx -= material->GetIonisation()->DensityCo 240 dedx -= material->GetIonisation()->DensityCorrection(x);
238 241
239 // shell and high order corrections << 242 // shell correction
240 dedx -= 2.0*corr->ShellCorrection(p,material 243 dedx -= 2.0*corr->ShellCorrection(p,material,kineticEnergy);
241 244
>> 245 // now compute the total ionization loss
>> 246
>> 247 if (dedx < 0.0) dedx = 0.0 ;
>> 248
242 // radiative corrections of R. Kokoulin 249 // radiative corrections of R. Kokoulin
243 if (cutEnergy > limitKinEnergy && kineticEne << 250 if (cutEnergy > limitKinEnergy) {
244 251
245 G4double logtmax = G4Log(cutEnergy); 252 G4double logtmax = G4Log(cutEnergy);
246 G4double logstep = logtmax - logLimitKinEn 253 G4double logstep = logtmax - logLimitKinEnergy;
247 G4double dloss = 0.0; 254 G4double dloss = 0.0;
248 G4double ftot2= 0.5/(totEnergy*totEnergy); 255 G4double ftot2= 0.5/(totEnergy*totEnergy);
249 256
250 for (G4int ll=0; ll<8; ++ll) { << 257 for (G4int ll=0; ll<8; ll++)
>> 258 {
251 G4double ep = G4Exp(logLimitKinEnergy + 259 G4double ep = G4Exp(logLimitKinEnergy + xgi[ll]*logstep);
252 G4double a1 = G4Log(1.0 + 2.0*ep/CLHEP:: << 260 G4double a1 = G4Log(1.0 + 2.0*ep/electron_mass_c2);
253 G4double a3 = G4Log(4.0*totEnergy*(totEn 261 G4double a3 = G4Log(4.0*totEnergy*(totEnergy - ep)/massSquare);
254 dloss += wgi[ll]*(1.0 - beta2*ep/tmax + 262 dloss += wgi[ll]*(1.0 - beta2*ep/tmax + ep*ep*ftot2)*a1*(a3 - a1);
255 } 263 }
256 dedx += dloss*logstep*alphaprime; 264 dedx += dloss*logstep*alphaprime;
257 } 265 }
258 dedx *= CLHEP::twopi_mc2_rcl2*eDensity/beta2 << 266
>> 267 dedx *= twopi_mc2_rcl2*eDensity/beta2;
259 268
260 //High order corrections 269 //High order corrections
261 dedx += corr->HighOrderCorrections(p,materia 270 dedx += corr->HighOrderCorrections(p,material,kineticEnergy,cutEnergy);
262 dedx = std::max(dedx, 0.); << 271
263 return dedx; 272 return dedx;
264 } 273 }
265 274
266 //....oooOO0OOooo........oooOO0OOooo........oo 275 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
267 276
268 void G4MuBetheBlochModel::SampleSecondaries( << 277 void G4MuBetheBlochModel::SampleSecondaries(vector<G4DynamicParticle*>* vdp,
269 std::vector<G4Dynami << 278 const G4MaterialCutsCouple*,
270 const G4MaterialCutsCouple* couple, << 279 const G4DynamicParticle* dp,
271 const G4DynamicParticle* dp, << 280 G4double minKinEnergy,
272 G4double minKinEnergy, << 281 G4double maxEnergy)
273 G4double maxEnergy) <<
274 { 282 {
275 G4double kineticEnergy = dp->GetKineticEnerg << 283 G4double tmax = MaxSecondaryKinEnergy(dp);
276 G4double tmax = MaxSecondaryEnergy(dp->GetDe << 284 G4double maxKinEnergy = min(maxEnergy,tmax);
277 G4double maxKinEnergy = std::min(maxEnergy, <<
278 if(minKinEnergy >= maxKinEnergy) { return; } 285 if(minKinEnergy >= maxKinEnergy) { return; }
279 286
280 G4double totEnergy = kineticEnergy + mass; << 287 G4double kineticEnergy = dp->GetKineticEnergy();
281 G4double etot2 = totEnergy*totEnergy; << 288 G4double totEnergy = kineticEnergy + mass;
282 G4double beta2 = kineticEnergy*(kineticEnerg << 289 G4double etot2 = totEnergy*totEnergy;
>> 290 G4double beta2 = kineticEnergy*(kineticEnergy + 2.0*mass)/etot2;
283 291
284 G4double grej = 1.; 292 G4double grej = 1.;
285 G4bool radC = (tmax > limitKinEnergy && kine << 293 if(tmax > limitKinEnergy) {
286 if(radC) { << 294 G4double a0 = G4Log(2.*totEnergy/mass);
287 G4double a0 = G4Log(2.*totEnergy/mass); << 295 grej += alphaprime*a0*a0;
288 grej += alphaprime*a0*a0; <<
289 } 296 }
290 297
291 G4double tkin, f; << 298 G4double deltaKinEnergy, f;
292 299
293 // sampling follows ... 300 // sampling follows ...
294 do { 301 do {
295 G4double q = G4UniformRand(); 302 G4double q = G4UniformRand();
296 tkin = minKinEnergy*maxKinEnergy/(minKinEn << 303 deltaKinEnergy = minKinEnergy*maxKinEnergy
297 f = 1.0 - beta2*tkin/tmax + 0.5*tkin*tkin/ << 304 /(minKinEnergy*(1.0 - q) + maxKinEnergy*q);
>> 305
>> 306
>> 307 f = 1.0 - beta2*deltaKinEnergy/tmax
>> 308 + 0.5*deltaKinEnergy*deltaKinEnergy/etot2;
298 309
299 if(radC && tkin > limitKinEnergy) { << 310 if(deltaKinEnergy > limitKinEnergy) {
300 G4double a1 = G4Log(1.0 + 2.0*tkin/CLHEP << 311 G4double a1 = G4Log(1.0 + 2.0*deltaKinEnergy/electron_mass_c2);
301 G4double a3 = G4Log(4.0*totEnergy*(totEn << 312 G4double a3 = G4Log(4.0*totEnergy*(totEnergy - deltaKinEnergy)/massSquare);
302 f *= (1. + alphaprime*a1*(a3 - a1)); 313 f *= (1. + alphaprime*a1*(a3 - a1));
303 } 314 }
304 315
305 if(f > grej) { 316 if(f > grej) {
306 G4cout << "G4MuBetheBlochModel::Sample 317 G4cout << "G4MuBetheBlochModel::SampleSecondary Warning! "
307 << "Majorant " << grej << " < " 318 << "Majorant " << grej << " < "
308 << f << " for edelta= " << tkin << 319 << f << " for edelta= " << deltaKinEnergy
309 << " tmin= " << minKinEnergy << 320 << " tmin= " << minKinEnergy << " max= " << maxKinEnergy
310 << G4endl; 321 << G4endl;
311 } 322 }
312 // Loop checking, 03-Aug-2015, Vladimir Iv <<
313 } while( grej*G4UniformRand() > f ); <<
314 323
315 G4ThreeVector deltaDirection; <<
316 324
317 if(UseAngularGeneratorFlag()) { << 325 } while( grej*G4UniformRand() > f );
318 const G4Material* mat = couple->GetMateria <<
319 deltaDirection = GetAngularDistribution()- <<
320 SelectRandomAtomNumber(ma <<
321 } else { <<
322 <<
323 G4double deltaMom = std::sqrt(tkin * (tkin <<
324 G4double totalMom = totEnergy*std::sqrt(be <<
325 G4double cost = tkin * (totEnergy + CLHEP: <<
326 (deltaMom * totalMom); <<
327 cost = std::min(cost, 1.0); <<
328 const G4double sint = std::sqrt((1.0 - cos <<
329 const G4double phi = twopi*G4UniformRand() <<
330 326
331 deltaDirection.set(sint*std::cos(phi),sint << 327 G4double deltaMomentum =
332 deltaDirection.rotateUz(dp->GetMomentumDir << 328 sqrt(deltaKinEnergy * (deltaKinEnergy + 2.0*electron_mass_c2));
333 } << 329 G4double totalMomentum = totEnergy*sqrt(beta2);
334 // create G4DynamicParticle object for delta << 330 G4double cost = deltaKinEnergy * (totEnergy + electron_mass_c2) /
335 auto delta = new G4DynamicParticle(theElectr << 331 (deltaMomentum * totalMomentum);
336 vdp->push_back(delta); << 332
>> 333 G4double sint = sqrt(1.0 - cost*cost);
>> 334
>> 335 G4double phi = twopi * G4UniformRand() ;
>> 336
>> 337 G4ThreeVector deltaDirection(sint*cos(phi),sint*sin(phi), cost) ;
>> 338 G4ThreeVector direction = dp->GetMomentumDirection();
>> 339 deltaDirection.rotateUz(direction);
337 340
338 // primary change 341 // primary change
339 kineticEnergy -= tkin; << 342 kineticEnergy -= deltaKinEnergy;
340 G4ThreeVector dir = dp->GetMomentum() - delt << 343 G4ThreeVector dir = totalMomentum*direction - deltaMomentum*deltaDirection;
341 dir = dir.unit(); << 344 direction = dir.unit();
342 fParticleChange->SetProposedKineticEnergy(ki 345 fParticleChange->SetProposedKineticEnergy(kineticEnergy);
343 fParticleChange->SetProposedMomentumDirectio << 346 fParticleChange->SetProposedMomentumDirection(direction);
>> 347
>> 348 // create G4DynamicParticle object for delta ray
>> 349 G4DynamicParticle* delta = new G4DynamicParticle(theElectron,
>> 350 deltaDirection,deltaKinEnergy);
>> 351 vdp->push_back(delta);
344 } 352 }
345 353
346 //....oooOO0OOooo........oooOO0OOooo........oo 354 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
347 355